Chongqing, an inland city, is located in the subtropical zone of north hemisphere, with mountains on the north and southeast. It has a humid mid-subtropical monsoon climate. Chongqing is also called one of the three "Furnace Cities" along the Yangtze River, with hot summer and warm winter and long frost-free period.

The climate of Chongqing is featured by: (1) Long frost-free period, hot summer and warm winter. January is the coolest month with average tem-perature of 7.8 C. Chongqing has the longest frost-free period in the area of the same latitudes, which lasts 340-350 days, with active accumulated tem-perature (> 0 C) being 6.000--6900 C. (2) Abundant but unevenly distributed precipitation. There are downpours, but under the influence of the Tibetan high and the subtropical high, drought usually occurs for 30-50 days in July and August. (3) Overcast and rainy autumn, cloudy and foggy winter, low sunshine exposure. Chongqing is also called "the City of Fog". (4) Distinct vertical dis-tribution of climate. With the influence of topography, there are generally two inversion layers at the height of 500-600 meter and 800 meter. Precipitation increases with higher elevations.

Pressure

monthly mean atmospheric pressure

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Pressure(hPa)

9922

9895

9856

9817

9786

9746

9720

9745

9816

9878

9913

9935

Pressure (hPa)

9922

9895

9856

9817

9786

9746

9720

9745

9816

9878

9913

9935

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.1 monthly mean pressure

Temperature

monthly mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Temp(oF)

46

49.1

56.4

65.3

72.1

77.1

82.5

83.3

74.4

65.4

57.2

48.7

Temp(oC)

7.8

9.5

13.6

18.5

22.3

25.1

28.1

28.5

23.6

18.6

14

9.3

Temperature (oC|oF)

7.8 oC 46 oF

9.5 oC 49.1 oF

13.6 oC 56.4 oF

18.5 oC 65.3 oF

22.3 oC 72.1 oF

25.1 oC 77.1 oF

28.1 oC 82.5 oF

28.5 oC 83.3 oF

23.6 oC 74.4 oF

18.6 oC 65.4 oF

14 oC 57.2 oF

9.3 oC 48.7 oF

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.2 monthly mean temperature

monthly extreme mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

42.8

45.5

51.8

59.5

66.3

71.6

76.2

76.4

69.4

61.5

53.6

45.6

Min Temp (oC)

6

7.5

11

15.3

19.1

22

24.6

24.7

20.8

16.4

12

7.6

Max Temp (oF)

50.5

54.5

63.3

73.2

80.4

84.9

91

92.4

81.8

71.4

62.4

52.8

Max Temp(oC)

10.3

12.5

17.4

22.9

26.9

29.4

32.8

33.6

27.7

21.9

16.9

11.6

monthly extreme daily temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

31.4

31.8

34.1

40.1

51.4

60

66.5

65.3

57.7

44.4

37.9

28.9

Min Temp (oC)

-.3

-.1

1.2

4.5

10.8

15.6

19.2

18.5

14.3

6.9

3.3

-1.7

Max Temp (oF)

65.8

74.6

93.2

95.1

100.2

100.7

104.3

107

107.4

95.1

83.6

65.4

Max Temp (oC)

18.8

23.7

34

35.1

37.9

38.2

40.2

41.7

41.9

35.1

28.7

18.6

Humidity

monthly mean hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity (%)

83

80

76

77

78

80

76

73

80

84

84

85

Hunidity (%)

83

80

76

77

78

80

76

73

80

84

84

85

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.3 monthly mean hunidity

monthly minimum daily hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity(%)

30

33

19

19

19

29

31

25

22

27

31

31

Precipitation

monthly mean precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

19.5

20.6

36.2

104.6

151.7

171.2

175.4

134.4

127.6

92.4

45.9

24.9

Days (Precipitation<0.1mm)

10.2

9.9

11.3

14.9

15.6

15.7

12.4

10.5

14.4

15.4

12.2

9.5

Days (Precipitation<10mm)

.1

.2

.8

3.4

4.4

4.7

4.5

3.7

4.4

3

1.1

.3

Days (Precipitation<25mm)

0

0

0

.9

1.8

2.1

2.2

1.8

1.2

.6

.1

0

Days (Precipitation<50mm)

0

0

0

.1

.4

.7

.9

.6

.2

.1

0

0

Precipitation (mm)

19.5

20.6

36.2

104.6

151.7

171.2

175.4

134.4

127.6

92.4

45.9

24.9

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.4 monthly mean precipitation

monthly maximum daily precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

19.3

15.8

136

81.5

179.9

125.1

206.1

144.7

122.1

51.8

49.1

16.3

Wind

monthly mean wind speed

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed(m/s)

1.1

1.2

1.6

1.5

1.5

1.4

1.5

1.6

1.4

1.1

1

1

Wind Speed (m/s)

1.1

1.2

1.6

1.5

1.5

1.4

1.5

1.6

1.4

1.1

1

1

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean wind speed

monthly maximum daily
wind speed and direction

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed (m/s)

7.3

9.6

12

17.7

26.7

15

15

17

11

10.3

14.2

8.6

Sunshine

monthly mean sunshine duration

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Duration (hour)

27.3

34.1

67.4

98

108.5

109.7

180.1

196

102.4

62.5

43.1

25.8

Duration (hour)

27.3

34.1

67.4

98

108.5

109.7

180.1

196

102.4

62.5

43.1

25.8

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean sunshine duration

monthly sunshine percentage

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Percentage (%)

8

11

18

25

26

26

42

48

28

18

13

8

Remarks:
Weather forecast is provided by China Meteorological Administration.
Climate information is based on monthly averages for 30-year period of 1971-2000.
Precipitation includes both rain and snow.